Laptop brick PS for 1875/6 gainclone? - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 20th August 2009, 05:54 PM   #1
mc510 is offline mc510  United States
diyAudio Member
 
Join Date: Jun 2009
Location: Berkeley, CA
Default Laptop brick PS for 1875/6 gainclone?

So, I'm noodling over building an 1875/1876 amplifier that I could use to drive bookshelf speakers from my portable mp3 player. I don't need total audiophile quality sound and I don't want the hassle or expense of building a top notch power supply, so I'm wondering if I can use a laptop brick power supply. I've got an +18 VDC, 3 amp brick that I'm considering for the job. My hope would be to build something like the single-voltage reference design so that I don't have to deal with getting -18v.

I suppose if this worked well that I'd find some discussion on the internets, but I don't. Perhaps the brick supply has too much ripple (though 1875/6 claim good ripple rejection)? Or perhaps the brick doesn't have reserve capacity to handle dynamic peaks? Or perhaps my idea of using single-voltage power supply is fraught with problems?

Any advice? Full disclosure: I can wield a soldering iron and follow a schematic, but I don't know anything at all about circuit design.

Thanks!

Last edited by mc510; 20th August 2009 at 08:45 PM.
  Reply With Quote
Old 20th August 2009, 09:02 PM   #2
diyAudio Member
 
Join Date: Feb 2005
Location: Watertown, NY
maybe you could use two of them. take the positive from one and connect it to the negative on the other. this will be gnd (0V) then the negative would be -18V with reference to the 0v point. and the positive will of course be +18V
  Reply With Quote
Old 20th August 2009, 10:46 PM   #3
mc510 is offline mc510  United States
diyAudio Member
 
Join Date: Jun 2009
Location: Berkeley, CA
yeah, i've seen some commentary online about using bricks to make a dual-voltage power supply. But I'm assuming (dangerous, i know) that the single-voltage circuit in the spec sheet (or some slight variant) is acceptable. If so, how bad of an idea would it be to plan on using my laptop brick as the power supply?
Attached Images
File Type: gif 1876.gif (40.1 KB, 106 views)
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Another brick in the wall Supersasha Introductions 6 16th February 2008 08:53 PM
Glass Brick Enclosures blupro Multi-Way 21 5th June 2007 08:05 PM
Goodbye Yellow Brick Road ThorstenL Everything Else 7 26th July 2006 04:42 AM
Brick wall schematic wanted! e96mlo Analogue Source 11 8th March 2003 12:11 AM


New To Site? Need Help?

All times are GMT. The time now is 04:04 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2